UK Oil & Gas Investments said that core, totalling 330 ft, has been successfully recovered from the Kimmeridge Limestone 4 (KL4) target zone at its 100%-owned Broadford Bridge-1 (BB-1) exploration well.
Mobile light oil continued to be observed seeping from multiple sections of fractured KL4 calcareous shales and limestones throughout the cored section.
Wet gas readings maintained high levels throughout the coring, being almost identical to those seen at the Horse Hill-1 (HH-1) Kimmeridge Limestone oil discovery, 27 km to the north east.
Mobile Kimmeridge oil was also recovered from the drilling fluid. Further core will be taken through the deeper KL3 target zone.
The presence of light mobile oil in fractured Kimmeridge shales is highly significant.
"At first look, this corroborates the finding from Horse Hill-1 that oil production was likely derived from a much larger reservoir "tank" than the two KL3 and KL4 zones alone," the company said.
"The possibility that we have encountered a single 600-700 feet thick, naturally fractured oil reservoir section, encompassing all four Kimmeridge Limestones and underlying a significant proportion of the wider Weald Basin, will now be rigorously examined during the flow testing programme."
At 9:10am: (LON:UKOG) UK Oil Gas Investments Plc share price was +0.33p at 2.35p